Alien Lore

One of the common tropes in the Alien Expanded Universe is android Xenomorphs.
They have been either created by a lone mad scientist or mass produced by some company.
Here is a list of notable android Xenomorphs, including the infamous Xenoborgs and the lovable Jeri.

Xenomorph Prime is the elusive Alien Homeworld which has been shown little in the Alien games and comic books.
Both humans and Predators have ventured there on different missions.
Here is a list of notable occurances of Xenomorph Prime throughout the Expanded Universe, as it has been never featured in the Alien movies.

The Xenomorph King is a special type of Alien rarely seen in the Alien lore.
It is known to be bigger than the queen Alien and even more agressive.
Here is a list of all notable Xenomorph Kings like the Rogue Xenomorph, the Hybrid King and the Kenner King Alien.

The female Xenomorph is the big and insect-like queen Alien. However, there are some female Xenomorph hybrids or special experiments who actually have feminine features.
Here is a list of all known female Xenomorphs from the Alien franchise, including unused concepts from the movies.

Here is an overview of all Xenomorph types from the Alien movies, including the facehugger, chestburster, warrior and queen Xenomorphs. As a bonus, some better-known Xenomorph types are also included from the games.

The Aliens have invaded Earth several times during its history in the Alien vs Predator franchise.
Here are listed 5 Earth invasions. The list is sorted chronologically and some of these events have been deemed non-canon.